Improvement in molding pipes



initrfl States vtjatrnt Gettin. f

WILLIAM SMITH, OF PITTSBURG, PENNSYLVANIA.

Letters Patent No. 108,647, dated October 25, 1870.

IMPR'OVEMENT |N MOLD|NG P|PES fr w The Schedule referred to in theseLetters Patent and making part of-the same.

To all whom, it 'may concern:

Be .it known that I, WILLIAM SMITH, of Pittsburg, in the county of'Allegheny and State of Penn- Sylvania, have invented certain new anduseful Improvementsrrn Molding Pipes; and I do hereby derequired forvarious sizes of pipes, entailing thereby considerable 'cost inproviding the requisite 4flasks.

i By'the use of my hereinafter-described invention one flask may be madesuitable for the molding of various sizes of pipes.

My invention also relates to a simple device whereby such flasks may beadjusted and held in any required position.

y In the accompanying drawing- Figure l is a section of an ordinarypipe-molding pit having one part of my invention attached, also showingan ordinary pipe-molding ilask. u

Figure 2, a section of an ordinary pipe-molding flask, with my inventionattached.

Figure 3, a plan of my invention.

Letters of reference denote parts.

Parallel with the side of an ordinary pipe-molding pit, S, I make arecess or passage, T, of sufiicient depth and size as will ailm'itrtheentry of a man.

Said passage .l is perforated at the side next to the pit S with holes,U, of suchi size as will admit the passage of an ordinary chain or rod,V, or any such device.

Staples or hooks, Q, or any such appliances, are attached to the-outerwall of the said passage l so that they will be opposite the said holesU, (which lie opposite to the ordinary ask`A,) so that a chain oranysuch device being attached to the said staples Q or theirequivalents, will pass through the said holes U, and can be attached inany suitable manner to the fiask A, so that, by tightening the saidchain V or its equivalent, or releasing the tension thereof, the saidliask A can be retained in any required position.

'Ihe ordinary pipe-askA isprovided at its base with the ordinary hingeddoor A1, which has a conical perforation, A2, through the centerthereof, so arranged that the conical end of the ordinary pattern B,

when lowered thereto by means of the ordinary crane or other such likemechanism, will penetrate the same, holding the said pattern B in avertical position.

Sand is then distributed in the ask A and around the said pattern B, andbeing rammed to the required solidity, the pattern B is then withdrawninV any suitable manner and the ordinary core inserted,

the operation of casting being performed as. ordinarily.

Flasks constructed as described only serve, how.-4

ever, for one diameter of pipe, since the perforation' A2 serves but forone pattern.

Io obviate .this I introduce an annular conical thimble, C, of suitablematerial, the outside diameter of which is equal to the diameter oftheperforation A2, into which it rits, the inner diameter being conical,and of a diameter equaling the conical end i a smaller pattern,'D, andso arranged that the said end of the pattern D will iit into the same,retaining it in a vertical position.

The said thimble O is also furnished, at its upper face, with theordinary groove E, hr `forming the ordinary bead at the end of the pipe;the o'peration of molding and casting being before described.

Some pipe-flasks, ho'wever, are not provided with hinged doors, but havevarious styles of stands, upon which the iask rests; but said stands(commonly termed ramming-up stools) are all pro'- vu'ded with conicalperforatious suitable for the reception ot' the ordinary pattern. Myinvention is applicable as readily to such stands as to the describedhingedV door A1.

Apart from the saving of great expense in thus needing but one size ol'flask to suit various sizes of pipes, much labor'and trouble is avoided,since some flasks have to be removed for the placing of other asks oflarger or smaller diameter, (as the case may be,) 'whichact causes astoppage in the operation of molding. Since, however, my invention canbe attached in a moment to the ask, they do not require to be moved,labor and time being saved thereby.

The advantage arising from the construction of a passage, T, aroundpipe-molding pits is, that the whole of the. liasks may be adjusted fromthe outside ofthe pit, saving thereby the use of scaffolding or ladders,and'also dispensing with the use of the ordinary appliances, such aswedges, heretofore used, saving time and also expense.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is l .the`saine as 1. The pipe-molding pits, constructed with a pas- In testimonythat I clain' the foregoing as my sage around and below the level of thetops thereof, own, I aflix my signature in prese-noe of two witj lsaidpassage having perforations in the side, 4subs-,tannesses.

tally as described and set forth. 'ILLI-AM SMITH.

2. The conical annular thimble G, as described, in 'itilesses:combination with the hinged door A1, substantially JAMES M. TAYLOR, asand for the purpose described and set forth. PERCIWAL BECKETT.

